The term 'ODE ON A GRECIAN URN POET' refers to the English Romantic poet John Keats (5 letters). His full name is John Keats (9 letters). He was born in 1795 and is one of the most beloved poets of the Romantic period. He is best known for his odes, which are lyrical poems that focus on a single emotion or idea. His most famous ode is 'Ode on a Grecian Urn, ' which was published in 1819. The poem is an exploration of beauty, art, and mortality.